This document provides an introduction and overview of AtoM and Archivematica. It discusses that Artefactual Systems is the lead developer of these open source applications for archival description, access, and digital preservation. AtoM allows for standards-based archival description and access in a multilingual, multi-repository environment. Archivematica supports digital preservation workflows based on the OAIS reference model. Both applications are free and open source with a community-based development approach. Artefactual offers hosting, support, and consulting services while also relying on a "bounty model" of open source business.